Quick count. Compiled YI Perelman. 1941.

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Uploaded: 01.07.2008
Content: schet.djvu (171,54 kB)

Description

Currently, there is no sale of manuals containing instructions for rapid implementation of computing operations in mind. We found it so useful to collect in the brochure the simplest and most easily acquired knack rapid oral accounts. They are designed for medium capacity and are not due to public performances on the stage, and the needs of everyday life.
Having learned the techniques recommended, you can perform quick calculations in his mind with the infallibility of written calculations.

Additional information

If you've always dreamed of learning to quickly take in mind, this book is for you

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